/// <summary>
/// find the target packet.
/// </summary>
/// <param name="smbHeader">the header of smb packet</param>
/// <param name="channel">the channel to access bytes</param>
/// <returns>the target packet</returns>
private static SmbPacket FindTheTargetPacket(SmbHeader smbHeader, Channel channel)
{
SmbPacket smbPacket = null;
switch (smbHeader.Command)
{
case SmbCommand.SMB_COM_NEGOTIATE:
smbPacket = new SmbNegotiateRequestPacket();
break;
case SmbCommand.SMB_COM_SESSION_SETUP_ANDX:
SmbHeader_Flags2_Values flags2 = (SmbHeader_Flags2_Values)smbHeader.Flags2;
if ((flags2 & SmbHeader_Flags2_Values.SMB_FLAGS2_EXTENDED_SECURITY)
== SmbHeader_Flags2_Values.SMB_FLAGS2_EXTENDED_SECURITY)
{
smbPacket = new Smb.SmbSessionSetupAndxRequestPacket();
}
else
{
smbPacket = new Cifs.SmbSessionSetupAndxRequestPacket();
}
break;
case SmbCommand.SMB_COM_TREE_CONNECT_ANDX:
smbPacket = new SmbTreeConnectAndxRequestPacket();
break;
case SmbCommand.SMB_COM_NT_CREATE_ANDX:
smbPacket = new SmbNtCreateAndxRequestPacket();
break;
case SmbCommand.SMB_COM_OPEN_ANDX:
smbPacket = new SmbOpenAndxRequestPacket();
break;
case SmbCommand.SMB_COM_WRITE_ANDX:
smbPacket = new SmbWriteAndxRequestPacket();
break;
case SmbCommand.SMB_COM_READ_ANDX:
smbPacket = new SmbReadAndxRequestPacket();
break;
case SmbCommand.SMB_COM_CLOSE:
smbPacket = new SmbCloseRequestPacket();
break;
case SmbCommand.SMB_COM_TREE_DISCONNECT:
smbPacket = new SmbTreeDisconnectRequestPacket();
break;
case SmbCommand.SMB_COM_LOGOFF_ANDX:
smbPacket = new SmbLogoffAndxRequestPacket();
break;
case SmbCommand.SMB_COM_TRANSACTION:
SMB_COM_TRANSACTION_Request_SMB_Parameters transaction =
channel.Read<SMB_COM_TRANSACTION_Request_SMB_Parameters>();
if (transaction.SetupCount == 0)
{
smbPacket = new SmbTransRapRequestPacket();
}
else
{
smbPacket = FindTheTransactionPacket(
transaction.SetupCount, (TransSubCommand)transaction.Setup[0]);
}
break;
case SmbCommand.SMB_COM_TRANSACTION2:
SMB_COM_TRANSACTION2_Request_SMB_Parameters transaction2 =
channel.Read<SMB_COM_TRANSACTION2_Request_SMB_Parameters>();
smbPacket = FindTheTrans2Packet((Trans2SubCommand)transaction2.Subcommand);
break;
case SmbCommand.SMB_COM_NT_TRANSACT:
SMB_COM_NT_TRANSACT_Request_SMB_Parameters ntTransactoin =
channel.Read<SMB_COM_NT_TRANSACT_Request_SMB_Parameters>();
smbPacket = FindTheNtTransPacket(ntTransactoin.Function, CifsMessageUtils.ToBytesArray<ushort>(ntTransactoin.Setup));
break;
default:
break;
}
return smbPacket;
}
